Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/41750
標題: Amperometric biosensors based on multiwalled carbon nanotube-Nafion-tyrosinase nanobiocomposites for the determination of phenolic compounds
作者: Tsai, Y.C.
蔡毓楨
Chiu, C.C.
關鍵字: biosensor
amperometry
multiwalled carbon nanotubes
tyrosinase
nation
electrochemical biosensors
composite film
electrodes
construction
immobilization
extraction
chitosan
glucose
phase
期刊/報告no:: Sensors and Actuators B-Chemical, Volume 125, Issue 1, Page(s) 10-16.
摘要: Amperometric biosensors for the determination of phenolic compounds (phenol, o-cresol, p-cresol, m-cresol, catechol, dopamine, and ephinephrine) have been constructed. It comprises a multiwalled carbon nanotube (MWNTs) conduit, a Nation backbone, and a tyrosinase function. The modification of glassy carbon electrode is made by a simple solution-evaporation method. The resulting multiwalled carbon nanotube-Nafion-tyrosinase (MWNT-Nafion-Tyr) nanobiocomposite film modified electrode is inexpensive, reliable, and easy to use. The homogeneity of the MWNT-Nafion-Tyr nanobiocomposite films was characterized by atomic force microscopy (AFM). The measurement of phenolic compounds is based on the signal produced by the electrochemical reduction of o-quinones, the product of the enzymatic reaction. Optimization studies were performed in stirred solution and the magnitude of response currents were found to be dependent on applied potential and enzyme loading. The optimized biosensor for phenol determination displayed a sensitivity of 303 mu A mM(-1) and a response time of less than 8 s. (c) 2007 Elsevier B.V. All rights reserved.
URI: http://hdl.handle.net/11455/41750
ISSN: 0925-4005
文章連結: http://dx.doi.org/10.1016/j.snb.2007.01.032
Appears in Collections:化學工程學系所

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